[IOTDB-3784] tag aggregation: basic support

Open cornmonster opened this issue 3 years ago • 1 comments

Please see: https://issues.apache.org/jira/browse/IOTDB-3784 For SQL grammar changes and examples: https://apache-iotdb.feishu.cn/docx/doxcnJRODVJEuadoIuBW0uHnmvc

Work Items:

[x] Basic GROUP BY TAG aggregaton.
[x] Tag by multi keys.
[x] Aggregation mixed with time window and tag keys.
[x] Tag aggregation with raw data time filter.
[x] Tag aggregation with raw data alue filter. Not supprted, the same with GROUP BY LEVEL.
[x] Integration test passed in cluster mode.
[x] User guide.

The limit & offset, ALIGN BY DEVICE, Aggregtion with inner expression, and HAVING will be supported in later PRs, as this one is very large now.

Jul 13 '22 06:07 cornmonster

I will handle this feature afterwards~ Thanks for your contribution @cornmonster